hello everyone, newbie here.
my car is 210035 E class. the problem is the battery keeps on draining. i dont want to bring it to the tech coz i think i can do this myself(with the help from you guys here of course). a simple electrical problem, i guess. but, how will i do it? where do i start? thanks in advance and more power to all of us!

 

Hi
First check your alternator for failure, also check voltage regulator. Since your battery keep draining out. That is a symbol of one way donor but not a receiver. The next issue is your battery not be able to hold charge if your alternator is Ok. Another note here is please check all connection and terminal for corrosion and loose contact. Do all possible related tasks and I believe that the first step for inspection adn testing. Be aware that sometime a bad terminal connection wit hloosing screw may effects to the drainage of the battery since the current in can't be filled but keep pull all out. Somebody may have more idea or experience please help with your opinion. Thanks

Regards,
Joseph

 

year model?